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Photo by Wm. Belnap, Jr.; 20.4a: © A. J. Copley/ Alamy; 21.9: © Bob Wallen; 21.12: © Frank M. Parker/SPL/Photo Researchers; 23.22: © Bill W.
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© Doug Sherman/Geofile; 20.11: © B. Amundson; of Austria. Behind the Science, p. 590: Courtesy of the
20.12a: © D. A. Rahm, photo courtesy of Rahm Chapter 22 Opener: © Galen Rowell/ Mathematical Institute at the University of St.
Memorial Collections, Western Washington Mountain Light Photography; 22.1, 22.16, 22.18 Andrews.
University; 20.13: © C. C. Plummer; People (both), 22.19 (all): © Bill W. Tillery. Chapter 24 Opener: © James H. Karales/Peter
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Chapter 21 Opener: Courtesy Eldon Enger; Peter Arnold/Photolibrary; 23.5, 23.7: © NOAA; 24.11, 24.14, 24.15: © Bill W. Tillery; 24.19:
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© W. B. Saunders/Biological Photo Service; 21.4: Carr; 23.18, 23.19 © NOAA; 23.21: © David Science, p. 616: © Bettmann/Corbis.
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700 Credits C-2